Perhaps you should try some spelling variations:
"light processing algorithm" » "signal processing algorithm" (Expand Search), "post processing algorithm" (Expand Search), "video processing algorithm" (Expand Search)
"time processing algorithm" » "image processing algorithm" (Expand Search), "pre processing algorithm" (Expand Search), "antigen processing algorithm" (Expand Search)
"sediment em algorithm" » "sediment new algorithm" (Expand Search), "sediment _ algorithm" (Expand Search), "sediment _ algorithms" (Expand Search), "sediment p algorithm" (Expand Search), "sediment from algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("light processing algorithm") OR ("time processing algorithm"))) OR ("sediment em algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"light processing algorithm\") OR (\"time processing algorithm\"))) OR (\"sediment em algorithm\"))".
• Removing quotes may allow a broader search: (((( light processing algorithm ) OR ( time processing algorithm ))) OR ( sediment em algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("light processing algorithm") OR ("time processing algorithm"))) OR ("sediment em algorithm"))*.